Foxconn 7870 User Manual

7870 Interfacility Link
Installation and User’s Guide

© Copyright 2008

This manual contains propriety and confidential information of Foxcom Reproduction,
release to any third party, or any other unauthorized use, of any information contained
herein is expressly forbidden.

The information contained in this document is believed to be accurate as of the time of
going to press. Specifications are subject to change without notice.

Corporate Office Israel

Beck Science Center
8 Hartom Street, Har Hotzvim
P.O.Box 45092
Jerusalem 91450
Tel: [phone]
Fax: [phone]

US Office

Princeton Forrestal Village
136 Main Street Suite 300
Princeton, NJ 08540
Tel: [phone]
Toll free: 1-866-ONEPATH
Fax: [phone]

Website: www.foxcom.com
e-mail: [e-mail]

South Africa Office

Block 4, Kingfisher Office Park 228
Siphosethu Rd.
Mt. Edgecombe
Durban, KwaZulu Natal
Tel. [phone]
Fax [phone]

Table of Contents

Important Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii

Chapter 1 Introduction to the 7870 Interfacility Link ..................................... 1

1.1 Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

1.2 Product Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

1.3 Panel Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

1.4 Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Chapter 2 Installation........................................................................................ 7

2.1 Setting up the Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

2.2 Connecting the Fiber Optic Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

2.3 Setting Up the Receiver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

2.4 Powering the IFL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

2.4.1 7180M Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.5 Connecting the Back Panel Jumpers. . . . . . . . . . . . . . . . . . . . . . . . . .13

2.6 Aligning the Fiber Optic Link . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Chapter 3 Product Specifications.................................................................. 17

3.1 7870 Interfacility Link Specifications . . . . . . . . . . . . . . . . . . . . . . . . . .17

3.2 Model Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

3.3 7870 Interfacility Link Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

3.3.1 Transmitter Pinout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

3.3.2 Receiver Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

3.4 7180M Chassis Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

3.4.1 7180M Alarm Connector Pinouts [J12] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

3.4.2 7180M Monitor Connector Pinout [J13]. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

3.4.3 7180M and Redundancy Switching. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Chapter 4 Troubleshooting ............................................................................ 25

Appendix 1 Cleaning Fiber Optic Connections ........................................... 27

Appendix 1.1 Cleaning Procedures for FC/APC Connectors ..................... 28

Appendix 1.2 Cleaning Procedure for FC/APC Bulkhead Ports ................. 29

Appendix 1.2.1 Swab Method .........................................................................................29

Appendix 1.2.2 Compressed Air Method .......................................................................29

Appendix 2 Installing a Standalone Unit...................................................... 31

Appendix 3 The 2380 Relay Adapter ............................................................ 33

Appendix 3.1 Installing the 2380 Relay Adapter .......................................... 34

Appendix 3.1.1 Parts Required for Installing the 2380 ................................................... 34

Appendix 3.1.2 Mounting the the 2380 Relay Adapter ...................................................34

Appendix 3.2 2380 Dimensions and Front Panel Label .............................. 36

Appendix 3.3 2380 Adapter Pinouts.............................................................. 37

Appendix 4 Pinout Charts and Diagrams..................................................... 39

7870 Interfacility Link Installation and User’s Guide page i
Foxcom proprietary information

Figures

Figure 1 Option Label. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Figure 2 7870T Transmitter Front and Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Figure 3 7870R Receiver Front and Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Figure 4 7870Transmitter Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Figure 5 7870R Receiver Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Figure 6 Typical Application of a 7870 Interfacility Link . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Figure 7 7180M Chassis Rear View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 8 Jumper Installation: Tx and Rx only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 9 Jumper Installation: 2040 Switch in slot 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 10 Jumper Installation: 2040 Switch in slot 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 11 Jumper Installation: 2040 Switch in slots 2 and 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 12 Fiber Optic Alignment Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Figure 13 Unit dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Figure 14 7810M Chassis Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Figure 15 7870T Transmitter pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 16 7870R Receiver pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 17 7180M Chassis rear view. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 18 7180M Chassis Pin numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 19 Wiping the connector with a Kim wiper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Figure 20 Wiping the connector with a Kim wiper [2] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Figure 21 Cleaning the Optical Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Figure 22 Cleaning the Optical Port [2] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Figure 23 Installing the guide pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Figure 24 Mounting the adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Figure 25 Mounting the Screws [1] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Figure 26 Mounting the screws [2] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Figure 27 Mounted 2380 Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Figure 28 2380 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Figure 29 2380 Front Label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Figure 30 2380 Pin Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Figure 31 Standard 7180M and 7180M with 2380 Relay Adapter Pinout . . . . . . . . . . . . . . . . . . 40

Figure 32 7180M and 2040 RF Switch Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Figure 33 Pinout of 7180M Jumper with 2040 RF Switch in slots 2 and 5 . . . . . . . . . . . . . . . . . . 42

Figure 34 Pinout of 7180M jumper with 2040 RF switch in slot 5 . . . . . . . . . . . . . . . . . . . . . . . . 43

Figure 35 Pinout of 7180M jumper with 2040 RF switch in slot 5 . . . . . . . . . . . . . . . . . . . . . . . . 44

Figure 36 Pinout of 7180 jumper with transmitter and receiver units only . . . . . . . . . . . . . . . . . . 45

Tables

Table 1 7870T Transmitter LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Table 2 7870R Receiver LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Table 3 7870 Interfacility Link Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Table 4 7870T Transmitter Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Table 5 7870R Receiver Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Table 6 7180M Alarm Connector [J12] Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Table 7 7180M Monitor Connector [J13] Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Table 8 Troubleshooting the Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Table 9 Troubleshooting the Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Table 10 Cleaning materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Table 11 2380 Alarms Pinouts [J2] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Table 12 7180M Monitor Connector [J4] Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

page ii Document no. 93-005-35-C5

Important Information

Important Information

Warranty and Repair Policy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii

General Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii

Specific Product Warranty Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii

Returns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv

Limitations of Liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv

Reporting Defects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v

Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v

Personal Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v

Equipment Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v

Warranty and Repair Policy

Foxcom performs testing and inspection to verify the quality and
reliability of our products. Foxcom uses every reasonable precaution
to ensure that each unit meets specifications before shipment.
Customers are asked to advise their incoming inspection, assembly,
and test personnel as to the precautions required in handling and
testing our products. Many of these precautions are to be found in
this manual.

The products are covered by the following warranties:

General Warranty

Foxcom warrants to the original purchaser all standard products sold
by Foxcom to be free of defects in material and workmanship for 24
months from date of shipment from Foxcom. During the warranty
period, Foxcom will repair or replace any product that Foxcom proves
to be defective. This warranty does not apply to any product which
has been subject to alteration, abuse, improper installation or
application, accident, electrical or environmental over-stress,
negligence in use, storage, transportation or handling.

Specific Product Warranty Instructions

All Foxcom products are warranted against defects in workmanship,
materials and construction, and to no further extent. Any claim for
repair or replacement of units found to be defective on incoming
inspection by a customer must be made within 30 days of receipt of
shipment, or within 30 days of discovery of a defect within the
warranty period.

This warranty is the only warranty made by Foxcom and is in lieu of
all other warranties, expressed or implied. Foxcom sales agents or
representatives are not authorized to make commitments on
warranty returns.

7870 Interfacility Link Installation and User’s Guide page iii
Foxcom proprietary information

Important Information

Returns

In the event that it is necessary to return any product against above
warranty, the following procedure shall be followed:

1. Return authorization is to be received from Foxcom prior to
returning any unit. Advise Foxcom of the model, serial number,
and discrepancy. The unit may then be forwarded to Foxcom,
transportation prepaid. Devices returned collect or without
authorization may not be accepted.

2. Prior to repair, Foxcom will advise the customer of our test
results and any charges for repairing customer-caused problems
or out-of-warranty conditions etc.

3. Repaired products are warranted for the balance of the original
warranty period, or at least 90 days from date of shipment.

Limitations of Liabilities

Foxcom's liability on any claim, of any kind, including negligence for
any loss or damage arising from, connected with, or resulting from
the purchase order, contract, quotation, or from the performance or
breach thereof, or from the design, manufacture, sale, delivery,
installation, inspection, operation or use of any equipment covered by
or furnished under this contact, shall in no case exceed the purchase
price of the device which gives rise to the claim.

EXCEPT AS EXPRESSLY PROVIDED HEREIN, FOXCOM MAKES NO
WARRANTY, EXPRESSED OR IMPLIED, WITH RESPECT TO ANY GOODS,
PARTS AND SERVICES PROVIDED IN CONNECTION WITH THIS AGREEMENT
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. FOXCOM
SHALL NOT BE LIABLE FOR ANY OTHER DAMAGE INCLUDING, BUT NOT
LIMITED TO, INDIRECT, SPECIAL OR CONSEQUENTIAL DAMAGES ARISING
OUT OF OR IN CONNECTION WITH FURNISHING OF GOODS, PARTS AND
SERVICE HEREUNDER, OR THE PERFORMANCE, USE OF, OR INABILITY TO
USE THE GOODS, PARTS AND SERVICE.

The Company's exclusive warranty and the remedy provided for
breach thereof shall not apply to:

1. Any Product used or operated other than pursuant to the
Company's written instructions,

2. Damage or deficiencies resulting from accident, alteration,
modification, misuse, tampering, negligence, improper
maintenance, installation or abuse,

3. Use of any Product other than at the Installation Site,

4. Use of any Product that is defective or damaged due to misuse,
accident, or neglect, or due to external electrical stress, lightning
or other acts of nature,

5. Use of any Product by a person who is not any authorized
employee of the Customer, or

6. Used other than as explicitly authorized in writing by the
Company.

page iv Document no. 93-005-35-C5

Important Information

Reporting Defects

The units were inspected before shipment and found to be free of
mechanical and electrical defects.

Examine the units for any damage which may have been caused in
transit. If damage is discovered, file a claim with the freight carrier
immediately. Notify Foxcom as soon as possible.

Note Keep all packing material until you have completed the

inspection.

Precautions

Personal Safety

OPTICAL RADIATION
Applying power to the transmitter unit will create a laser energy
source operating in Class I as defined by IEC 825-1. Use either an
infrared viewer, optical power meter or fluorescent screen for optical

output verification.

AC P

OWER HAZARD

The rackmount power supply line is EMI filtered. The chassis is
connected to earth ground in compliance with safety requirements.
Always use the 3-prong AC plug with earth ground to avoid
possibility of electrical shock hazard to personnel.

Equipment Safety

To avoid damaging your product, please observe the following:

1. The output of the receiver is AC coupled and can withstand the
bias from a satellite receiver.

Do not exceed 25V DC bias.

2. The input of the transmitter has an optional built-in bias for
inserting DC power up the coax to the LNB. Make certain that
any equipment or test equipment connected to the transmitter
input can withstand this bias.

3. Do not allow any dirt or foreign material to get into the optical
connector bulkheads. This may cause damage to the polished
optical connector end faces.

4. The optical fiber jumper cable bend radius is 3 cm. Smaller radii
can cause excessive optical loss and/or fiber breakage.

5. If multiple transmitters are installed in the chassis allow
sufficient room for adequate ventilation; otherwise the units may
overheat causing possible safety hazard or equipment damage.

6. Fuses: The 7180M chassis does not have fuses. If the unit fails, pull
the power supply out from the chassis and then push it back in.

7. When several units are installed on one 7180M chassis, ensure
that the total units’ current consumption (including any LNB
bias) does not exceed 6A.

7870 Interfacility Link Installation and User’s Guide page v
Foxcom proprietary information

Important Information

page vi Document no. 93-005-35-C5

1 Introduction to the 7870 Interfacility Link

1.1 Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.2 Product Drawings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.3 Panel Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.4 Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

The 7870 IFL is a 10 – 200 MHz IF fiber optic link used primarily in
short distance, single channel video applications with high input/
output power levels. The 7870 IFL consists of an optical transmitter
(7870T) which receives signals from satellite modems, video
modulators, or exciters and transmits them to an optical receiver
(7870R) via singlemode fiber.

The 7870T and 7870R modules plug into a 7180M, a 3U chassis and
power supply, which enables expansion of the system to
accommodate up to eight Sat-Light™ modules. Accessories include
the Model 7001P Power Supply, the Model 2040 1:1 Redundant
Switch, the Model 2100 Amplifier, and the Model 7050 Serial Optical
Multiplexer, an asynchronous data transceiver.

The 7870 IFL transmits all satellite modulation schemes - digital or
analog. Any FM modulated RF signal is transmitted accurately. The
RF signal is directly modulated and adds virtually no phase noise to
the original signal. The direct modulation, along with extremely flat
amplitude and group delay, guarantees low bit error rate (BER) and
high signal quality, independent of distance.

LEDs, and back panel monitors, and alarms allow for complete
system status monitoring and for interfacing with monitor and
control (M&C) systems. Gain Control at the Receiver sets the RF
level.

7870 Interfacility Link Installation and User’s Guide page 1
Foxcom proprietary information

1.1 Options

1.1 Options

The 7870 Interfacility Link comes with a variety of options:

1. 50 Ω Input/Output Impedance/BNC female connector; Standard
impedance is 75 Ω/BNC, female connectors.

2. Standalone unit; The 7870 IFL can be installed as a standalone
unit. If the 7870 is used as a standalone, a separate power supply
must be used.

On the side of the 7870T and the 7870R units is a label

1

which lists
the options. Under each option is a square. If the unit includes a
particular option the square under the option should be marked.

Figure 1 Option Label

1. The sticker includes options which are not relevant to the 7870 IFL.

page 2 Document no. 93-005-35-C5

1.2 Product Drawings

Figure 2 7870T Transmitter Front and Rear Panel

1.2 Product Drawings

Figure 3 7870R Receiver Front and Rear Panel

7870 Interfacility Link Installation and User’s Guide page 3
Foxcom proprietary information

1.3 Panel Descriptions

1.3 Panel Descriptions

On the Front Panel of the 7870 IFL units are two LEDs. Both LEDs
should be on when the unit is in use. T

The LEDs on the Front Panel of the
are:

LED Name LED Function

Laser

RF

Table 1 7870T Transmitter LEDs

LED Name LED Function

Opt.

RF

Indicates if the laser is functioning

Indicates RF signal level

• Green: Input level is within 3 dB of specification (level is -2 to -28
dBm)

• Amber: Input level exceeds maximum recommended level by 3
dB or more (level is >-2 dBm)

• Off: Input level is below minimum recommended level by 3 dB or
more (level is < -28 dBm

Indicates if the optical input power is above the minimal level [≥3 dBm]

Indicates RF signal level

• Green: Input level is within 3 dB of specification (level is -2 to -28
dBm)

• Amber: Input level exceeds maximum recommended level by 3 dB
or more (level is >-2 dBm)

• Off: Input level is below minimum recommended level by 3 dB or
more (level is < -28 dBm

7870 Transmitter and Receiver

Table 2 7870R Receiver LEDs

page 4 Document no. 93-005-35-C5

1.4 Block Diagrams

1.4 Block Diagrams

Figure 4 7870Transmitter Block Diagram

Figure 5 7870R Receiver Block Diagram

7870 Interfacility Link Installation and User’s Guide page 5
Foxcom proprietary information

1.4 Block Diagrams

page 6 Document no. 93-005-35-C5

2 Installation

Chapter 2 describes how to install the 7870 Interfacility Link units.
Setting up the

2.1 Setting up the Transmitter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.2 Connecting the Fiber Optic Cable. . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.3 Setting Up the Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.4 Powering the IFL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.4.1 7180M Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.5 Connecting the Back Panel Jumpers . . . . . . . . . . . . . . . . . . . . . . . 13

2.6 Aligning the Fiber Optic Link . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Observe all warnings and cautions mentioned at the beginning of
this manual (See

7870E Transmitter/Receiver consists of:

Important Information on page iii).

If after set-up you experience problems, see

Chapter 4 Troubleshooting

on page25.

Figure 6 Typical Application of a 7870 Interfacility Link

7870 Interfacility Link Installation and User’s Guide page 7
Foxcom proprietary information

2.1 Setting up the Transmitter

2.1 Setting up the Transmitter

1. Place the 7870T in the 7180M Chassis.

2. Apply AC power to the chassis. The Power Supply and Laser
LEDs should be lit.

3. Using an optical power meter, measure the optical power. Insert
the meter’s cable into the Transmitter’s optical connector. Power
levels should be 0.5 mW minimum (-3 dBm).

Alternatively, use a DVM to measure the voltage at:

•

7180M Rackmount: Pins J13-P17 through J13-P24 for the slot

being measured (See
for details regarding J13 pinouts). [7180M Rackmount]

• Standalone: At pin #6 of the 9 pin connector [Standalone]

The signal level should be -4.5 ± -0.3VDC.

4. On the rear panel, connect the coax cable to the RF Input
Connector. The RF LED should be lit.

5. On the rear panel, connect the fiber optic cable to the Optical
Connector.

Table 4 7870T Transmitter Pinout on page20

Note If either LED is not lit, see Chapter 4 Troubleshooting on page25.

Caution When monitoring the voltage outputs use only a high

resistance DVM.

page 8 Document no. 93-005-35-C5

2.2 Connecting the Fiber Optic Cable

2.2 Connecting the Fiber Optic Cable

Before connecting the cable:

1. The fiber optic cable must be either fusion spliced or connected via
FC/APC connectors.

2. Wipe the connector with a lint-free cotton cloth.

3. Note the polarity key of the optical connector before inserting.

To connect the cable:

1. Line Up the Polarity Key.

2. Insert the connector

3. Tighten the connector

Caution Do not apply any glue, silicon adhesive, or any other

material to the fiber optic connector!

7870 Interfacility Link Installation and User’s Guide page 9
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